My device hangs when I try to use Bluetooth on the Sona TI351. The radio is connected to a FTDI USB to Serial Interface. Is this a problem?

Sona TI351

Answer

Yes, the Sona TI351 Bluetooth radio requires that the host must immediately stop transmitting when RTS is asserted. If even one byte is transmitted then the firmware will hang. You must disable the power saving “autonomous” mode before enabling the Bluetooth interface.

echo "0" > /sys/kernel/debug/ieee80211/wlan0/cc33xx/sleep_auth